Solves 500 error for some users

Update README.md

Update app.py

Update README.md

Rename HF_Logo (2).png to HF_Logo.png

Rename certificate_template (2).png to certificate_template.png

Rename LuxuriousScript-Regular (1).ttf to LuxuriousScript-Regular.ttf

Rename OFL (1).txt to OFL.txt

Rename app (24).py to app.py

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